1. Burbidge, E. M., Burbidge, G. R., Fowler, W. A. & Hoyle, F. Rev. mod. Phys. 29, 547–650 (1957).
2. Clayton, D. D. Principles of Stellar Evolution and Nucleosynthesis (Univ. Chicago Press, 1983).
3. Fowler, W. A. Science 226, 922–935 (1984).
4. Thiemens, M. H. in Meteorites and the Early Solar System (eds Kerridge, J. F. & Matthews, M. S.) 899–923 (Univ. of Arizona Press, Tucson, 1988).
5. Mauersperger, K. Geophys. Res. Lett. 14, 80–83 (1987).